Updating JMH
diff --git a/benchmark/pom.xml b/benchmark/pom.xml
index bcdf0e1..77630d5 100644
--- a/benchmark/pom.xml
+++ b/benchmark/pom.xml
@@ -31,7 +31,7 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <jmh.version>1.19</jmh.version>
+    <jmh.version>1.21</jmh.version>
     <javac.target>1.7</javac.target>
     <uberjar.name>benchmarks</uberjar.name>
   </properties>